# Relationship history for MSHA mine 2401577

Current hierarchy: **Fayram B Dale → Sparrow Resources Ltd → Century Unit**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Fayram B Dale → Century Unit; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sparrow Resources Ltd → Century Unit; 1980-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fayram B Dale → Sparrow Resources Ltd; 1980-07-01 to current/open; source msha-controller-operator-history